Machine for manufacturing spring-headed nails.



F.GOLD[ MACHINE FOR MANUFACTURING SPRING BEADED NAILS.

APPLICATION FILED JUNE 17, 1913/ 1,093,398. Patented Apr.-14,191 Lfrbmeizzar QFGOZdL hurrah sra'rns ra'rnnr oriucn.

FRANK GOLD, OF RICHMOND, VICTORIA, AUSTRALIA.

MACHINE FOR MANUFACTURING SPBING-HEADED NAILS.

oesses.

of Victoria, Commonwealth of Australia,

have invented certain new and useful Improvements in Machines forManufacturing Spring-Headed Nails, of which the following is aspecification.

This invention relates to the manufacture of nails of the type having aconcavo-convex washer, galvanized or otherwise secured in positionbeneath the head of the nail shank thereby providing a spring headednail.

At present a common practice in making wire nails is to first feed ashort predetermined amount of the wire from which the nails are formedthrough a die formed with two jaws one of which is adapted to open fromthe other to permit a predetermined length of the wire to pass. It thencloses and grips the wire. A punch then flattens or expands the shortlength of wire to form the nail head. The punch then recedes and thewire is fed onwardly through the die to provide the nail shank. Cuttersare adapted to now out and point the length of wire last fed, whichcompletes the nail. The cutters sever and point the wire at a pointbeyond the die, thus leaving a short projecting length which the punchflattens or expands in the neXt cycle of operations to form a11- othernail head. i

A usual practice has been to form the spring washers for use with thenails by another machine and to place or thread them upon the nails byhand. hen a washer has been placed beneath the head of a nail shank thetwo are treated in a galvanizing bath which retains the washer to theshank head, the resultant product being a nail with a concavo-convexspring head. On account of the multiplicity of operations such a methodobviously wastes considerable time and labor.

The object of the present invention lS tO so equip a nail making machinethat it will, in addition to making the nail, also form the springwasher therefor and position it upon the nail shank. By the invention,therefore, the nail and its washer are formed and assembled in the onemachine and the invention consists broadly in making the Washer,positioning it upon the wire which is to form the nail shank, and thenforming the head of the shank.

Specification of Letters Patent.

Application filed June 17, 1913.

Patented Apr. 14:, 191a. Serial No. 774,250.

According to the invention a strip of metallic tape is intermittentlyfed into a machine between the punch and the die thereof and the punchand die are of such a conformation that a concavoconvex washer isstamped from the tape with each inward movement of the punch. Thearrangement is such that the shank of the nail being formed penetratesthrough the washer and has a head formed by the punch after suchpenetration.

Referring to the drawings which form a part of this specification:Figure l is a plan showing in broken lines, well known elements of anail making machine. In full lines are seen elements by which thisinvention may be carried into effect. The positions of the nail makingelements are those assumed when a nail has just been completed, thepunch having receded and cutters having moved inwardly. Fig. 2 is adetail view showing an intermediately pivoted lever and a ratchet wheeloperated thereby to feed the tape from which the spring washers areformed. Fig. 3 is a side elevation showing another manner of feeding thetape. Fig. 4 is an enlarged detail view of a die and punch according tothis invention. Fig. 5 is a view of a nail manufactured according tothis invention.

The nail making machine includes a crank shaft 2. Pivotally connected tothe crank pin of the crank of the said shaft is one end of a connectingrod 3, the other end of which is connected to one end of a reciprocatingslide 4:, provided with two cam surfaces 5. Situated at the other end ofthe reciprocating slide is a punch 6. These elements are all well known.

Formed in the inner end of the punch, according to this invention, is aconcave washer chamber 7 Also formed in the said punch and in the washerchamber is a concave shank head chamber 8. The precise conformation andarea of these chambers may vary, being dependent upon the size and typeof nail manufactured.

Upstanding from the framework of the machine, at each side of thereciprocating slide l, is a pivot pin 9. Intermediately pivoted to eachpin 9 is a lever 10, having mounted at one end a roller 11. Each roller11 engages with a cam surface 5. At the other end of each lever 10 issituated a cutter 12. The cutters slide in suitable guides and may becontrolled as also may each lever 10 by a spiral or the like spring. Thelevers, rollers and slides are common to most nail making machines.Adjoining the punch 6 is a die consisting of two jaws 13. One of thejaws 13 is stationary and the other adapted to open or move awaytherefrom as is usual. Formed in the jaws is a wire passageway 1a. Thedie as described is also common to nail making machines. Project ingfrom the jaws of the die, according to this invention, is a convexwasher protuberance 15. Also projecting from the jaws of the die is acircumferential step or shoulder 16 having a shearing edge 17. Betweenthe protuberance 15 and the step or shoulder 16 is an annular recess 18.

According to the present invention, in addition to the novel punch anddie, there may be attached to the slide at a tappet arm 19 having afriction roller 20. The tappet arm 19 may be adjustable in relation tothe slide 4 in any known manner. Intermediately pivoted by a pivot pin21, carried by the machine framework, is a lever 22 situated below thetappet arm roller 20. Upstanding from the lever, at one side of the pin21, is a cam surface 23. This may be adjustable in relation to the lever22 in any well known way. Carried by the lever, at the other-side of thepin 21, is a pivoted pawl 24 engaging with a ratchet wheel 25, mount-'ed upon a shaft 26. Mounted upon the shaft 26 is also a driving frictionroller 27 adjoining which is an idle friction roller 28, mounted upon anidle shaft 29. Attached to the framework or otherwise retained inposition above the friction rollers 27 and 28 is a tape guide 30. Thismay be of any desired character. Adjoining the friction rollers is aleading pulley 31 mounted upon a shaft 32.

Above the punch and die is a tape spool 33 mounted upon an idle spoolshaft 3 1. Accommodated by the spool 33 is a tape 35. This passes aroundthe leading pulley 31, around the friction roller 27 and between thesame and the idle roller 28. It then passes upwardly through the tapeguide 30 (as shown in Fig. 3).

Instead of operating the ratchet wheel 25 and friction roller 26 bymeans of a tappet arm 19 and intermediately pivoted lever 22 aneccentric 36 may be provided upon the crank shaft 2 and by a connectingrod 37 oscillate an arm 38. The lower end of the arm loosely embracesthe shaft 26. Pivoted to the arm is a pawl 39 engaging the ratchet wheel25.

With this invention, the wire from which the nails are to be formed, isfirst placed in position in the die 13 with a short length of the saidwire projecting outwardly from the said die. Upon the crank shaftrotating, the connecting rod 3 and reciprocating slide 1, move the punch6 inwardly as is usual. As the slide 4 moves inwardly the roller 20 ofthe tappet arm 19 engages the cam surface 23 and depresses theintermediately pivoted lever 22 at one end. The pawl 24 is therebyraised partially rotating the ratchet wheel 25 and shaft 26. In theconstruction shown in Fig. 3 as the crank shaft 2 rotates the eccentric36 connecting rod 37 and lever 38 will, by the pawl 39 and ratchetwheel, partially rotate the said shaft 26. As the shaft 26 rotates, thefriction roller 27 also rotates and moves the tape 35 upwardly throughthe guide 30. The tape is now interposed between the punch and the dieand as the said punch moves inwardly it stamps a washer from the saidtape. As the punch continues to move inwardly the washer assumes theconformation of the chamber 7 and protuberance 15. The wire projectingfrom the die pierces the washer during such operation and enters thecharm ber 8. As the punch still further moves toward the die, the wirewithin the chamber 8 is spread or expanded forming the shank head in theusual manner. the reciprocating slide at now commences to recede fromthe die and by the cam surfaces 5 and rollers 11 moves the cutters12inwardly. As the punch recedes, by any suitable mechanism common tonail making machines, the die opens and the wire from which the nail isbeing formed passes through the said die and follows the direction oftravel of the punch. hen the wire has moved a predetermined amount, thedie closes and grips the wire. The cutters continue to move inwardly andsever the wire, the nailbeing now completed and falling by gravity fromthe machine. The washer 40, as seen in Fig. 5, is situated upon theshank 11 of the nail and beneath the shank head 42. It is only necessaryto pass the washer and nail through a galvanizing bath to unite the saidwasher 40 with the shank head 42, the resultant product being a springheaded nail. Any suitable guides or other means may be employed todivert any surplus material after the washers have been stamped from thetape 35.

It is to be understood'that other mechanism may be employed for feedingthe metallic tape 35 between the die and the punch at the correctmoment, the two embodiments shown being illustrative only. The washersneed not necessarily be stamped from a tape or strip and the blankmaterial may obviously be fed downwardly instead of upwardly or in anyother direction dependent upon circumstances.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent is 1. In a nail making machine, the combinationof a frame, a nail stem die formed at its end with a flange receivingrecess, a

The punch by punch having a recess corresponding to the shape of therecess in the end of the die, the center of the recess in the die beingdeepened to form a seat for the head of a nail, means for interposing astrip of metal from which the flange of the nail is to be formed betweenthe die and the punch, means for moving the punch into engagement withthe die and forming a flange from the interposed strip and causing theend of the nail stem to be forced through said flange and into thedeepened recess and formed into a head on the outside of the flange.

2. In a nail makin machine, the combination of a die comprlsing astationary part and a movable part to hold and clamp a rod, the end ofthe latter projecting beyond the free end of said die, means forinterposing and holding a strip of metal in front of the projecting endof the rod, said die having a flange receiving recess in its free end, apunch formed with a recess corresponding to the shape of the recess inthe end of the die, the center of the recess having a centraldepression, and means for moving the punch toward the die and forcingthe strip against the rod, the latter piercing the strip, and thesubsequent movement of the punch severing the strip to form a flange andupsetting the end of the rod on the outer surface of said flange.

8. In a nail making machine, the combination of a nail die formed in itsend with a flange receiving recess, means for introducing a stri ofmetal in front of the recess in the die, a punch formed with a recesscorresponding to the recess in the end of the die, the center of therecess in the punch being deepened, centers for severing the metaloperated upon by the die, means operated by movement of the punch foroperating the cutters, and means for operating the cutter, whereby thestrip will be forced on the nail stem held by the die and the recesseswill simultaneously formaflange on the stem and the end of the latterwill be headed on the outside of the flange.

4. In a nail making machine, the combination of a nail stem die formedin its end with a recess and a cutting edge surrounding the recess,means for introducing a strip of metal in front of the die, a crosshead, a punch extending from the cross head and formed at its end with arecess corresponding to the recess in the end of the die, said recess inthe punch being centrally deepened, cams on the side of the cross head,pivoted levers in engagement with the cams and operated thereby, cutterscarried by the pivoted levers and operable to sever the stem of the nailadjacent the die, and means for reciprocating the cross head to operatethe punch to force the strip of interposed meta-l against the stem andcause the latter to penetrate said strip, and sub sequently force thestrip into the recess in the die and sever same to form a flange, andsimultaneously upset the outer end of the stem on the outside of theflange.

In testimony whereof I have hereunto affixed my signature in thepresence of two subscribing witnesses.

FRANK GOLD. \Vitnesses:

ADELAIDE JAMIESON, DAPI-INE GLAnYs HANSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

